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A DC10 leaves north atlantic track U and altitude when #3 engine suffers a compressor stall and is shut down.
| Attributes | |
| ACN | 404944 |
| Time | |
| Date | 199806 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : czqx |
| State Reference | NF |
| Altitude | msl bound lower : 28000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : czqx tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other other |
| Route In Use | enroute : atlantic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 54 flight time total : 10000 flight time type : 217 |
| ASRS Report | 404944 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 82 flight time total : 4700 flight time type : 72 |
| ASRS Report | 404549 |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude inflight encounter other non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : overcame equipment problem flight crew : declared emergency |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
While flying on nat track U, #3 engine compressor stalled at FL330. It was possibly caused from turbulence encountered. We were in light turbulence and got a couple good jolts and then it stalled. The first officer began descent out of FL330 and turned 90 degrees north away from the track. Captain (PNF) and so completed the engine failure checklist while first officer (PF) broadcast mayday on gander oceanic. So and I saw nothing obvious wrong with the engine and attempted a restart. First officer (PF) turned parallel to the track 25 mi offset and leveled at FL280. So broadcast on VHF position. After engine restarted, we called gander and were reclred on track U at FL290. We called dispatch on HF phone patch through stockholm radio and got confirmation to continue to frankfurt. HF phone patch was poor. Maintenance was also notified. Supplemental information from acn 404549: engine #3 compressor stalled and was shut down. PF (first officer) broadcast mayday on gander oceanic HF frequency. Only real problem was horrible communications with gander oceanic on HF radio, as dawn was approaching. Communications were 2 by 2 on HF, and messages had to be repeated several times. I passed several broadcasts on VHF to let other aircraft on nat tracks know our situation, position, and where turbulence was encountered.
Original NASA ASRS Text
Title: A DC10 LEAVES NORTH ATLANTIC TRACK U AND ALT WHEN #3 ENG SUFFERS A COMPRESSOR STALL AND IS SHUT DOWN.
Narrative: WHILE FLYING ON NAT TRACK U, #3 ENG COMPRESSOR STALLED AT FL330. IT WAS POSSIBLY CAUSED FROM TURB ENCOUNTERED. WE WERE IN LIGHT TURB AND GOT A COUPLE GOOD JOLTS AND THEN IT STALLED. THE FO BEGAN DSCNT OUT OF FL330 AND TURNED 90 DEGS N AWAY FROM THE TRACK. CAPT (PNF) AND SO COMPLETED THE ENG FAILURE CHKLIST WHILE FO (PF) BROADCAST MAYDAY ON GANDER OCEANIC. SO AND I SAW NOTHING OBVIOUS WRONG WITH THE ENG AND ATTEMPTED A RESTART. FO (PF) TURNED PARALLEL TO THE TRACK 25 MI OFFSET AND LEVELED AT FL280. SO BROADCAST ON VHF POS. AFTER ENG RESTARTED, WE CALLED GANDER AND WERE RECLRED ON TRACK U AT FL290. WE CALLED DISPATCH ON HF PHONE PATCH THROUGH STOCKHOLM RADIO AND GOT CONFIRMATION TO CONTINUE TO FRANKFURT. HF PHONE PATCH WAS POOR. MAINT WAS ALSO NOTIFIED. SUPPLEMENTAL INFO FROM ACN 404549: ENG #3 COMPRESSOR STALLED AND WAS SHUT DOWN. PF (FO) BROADCAST MAYDAY ON GANDER OCEANIC HF FREQ. ONLY REAL PROB WAS HORRIBLE COMS WITH GANDER OCEANIC ON HF RADIO, AS DAWN WAS APCHING. COMS WERE 2 BY 2 ON HF, AND MESSAGES HAD TO BE REPEATED SEVERAL TIMES. I PASSED SEVERAL BROADCASTS ON VHF TO LET OTHER ACFT ON NAT TRACKS KNOW OUR SIT, POS, AND WHERE TURB WAS ENCOUNTERED.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.